The Arctic Home in the Vedas c8.s1.32

c8.s1.32

*Entered into her*: according to Sâyaṇa *asyâm* (into her) means "into the earth;" compare Ṛig. III, 61, 7, where the sun, the speeder of the dawns, is said to have 'entered into the mighty earth and heaven.' According to A. V. reading the meaning would be "entered into the other (dawns)," shewing that the first dawn is a member of a larger group.